The general public has pretty much accepted lesbian, gay, bisexual, people but not without a struggle.
Now for MTF's it's still ongoing and doesn't matter if you're from CD to TS. People just have a hard time with the need to change sexual identities even if it's temporary. It just seems too hard for some of them to grasp. They don't get that we don't just decide to do it.
There has been some progress but it's slow going.
Sadly I have no answers on how to help change the attitudes of the public.
*edit*
Oh Wait! Maybe I do know a way. Dr. Oz recently had a show that dealt with TS transitioning. It helped educate people. Maybe this is the best and fastest way.
BTW everybody I'm not whining here but looking for ways to change perceptions quicker. We are the most misunderstood TG group left.